1 files changed, 92 insertions, 0 deletions
diff --git a/REORG.TODO/hurd/get-host.c b/REORG.TODO/hurd/get-host.c
new file mode 100644
index 0000000000..be8345fbf9
--- /dev/null
+++ b/REORG.TODO/hurd/get-host.c
@@ -0,0 +1,92 @@
+/* Get a host configuration item kept as the whole contents of a file.
+   Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fcntl.h>
+#include <hurd.h>
+#include <hurd/lookup.h>
+#include "hurdhost.h"
+#include <string.h>
+
+ssize_t
+_hurd_get_host_config (const char *item, char *buf, size_t buflen)
+{
+  error_t err;
+  char *data;
+  mach_msg_type_number_t nread, more;
+  file_t config;
+
+  err = __hurd_file_name_lookup (&_hurd_ports_use, &__getdport, 0,
+				 item, O_RDONLY, 0, &config);
+  switch (err)
+    {
+    case 0:			/* Success; read file contents below.  */
+      break;
+
+    case ENOENT:		/* ? Others?  All errors? */
+      /* The file does not exist, so no value has been set.  Rather than
+	 causing gethostname et al to fail with ENOENT, give an empty value
+	 as other systems do before sethostname has been called.  */
+      if (buflen != 0)
+	*buf = '\0';
+      return 0;
+
+    default:
+      return __hurd_fail (err);
+    }
+
+  data = buf;
+  nread = buflen;
+  err = __io_read (config, &data, &nread, -1, buflen);
+  if (! err)
+    /* Check if there is more in the file we didn't read.  */
+    err = __io_readable (config, &more);
+  __mach_port_deallocate (__mach_task_self (), config);
+  if (err)
+    return __hurd_fail (err);
+  if (data != buf)
+    {
+      memcpy (buf, data, nread);
+      __vm_deallocate (__mach_task_self (), (vm_address_t) data, nread);
+    }
+
+  /* If the file is empty, give an empty value.  */
+  if (nread == 0)
+    {
+      if (buflen != 0)
+	*buf = '\0';
+      return 0;
+    }
+
+  /* Remove newlines in case someone wrote the file by hand.  */
+  while (nread > 0 && buf[nread - 1] == '\n')
+    buf[--nread] = '\0';
+
+  /* Null-terminate the result if there is enough space.  */
+  if (nread < buflen)
+    buf[nread] = '\0';
+  else
+    if (buf[nread - 1] != '\0')
+      more = 1;
+
+  if (more)
+    /* If we didn't read the whole file, tell the caller to use a bigger
+       buffer next time.  */
+    return __hurd_fail (ENAMETOOLONG);
+
+  return nread;
+}